CN1920842A - Method and system for replacing copyright object in digital copyright management system - Google Patents
Method and system for replacing copyright object in digital copyright management system Download PDFInfo
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Abstract
The invention relates to a method for obtaining version object in digit version managing system and relative system, wherein said method comprises: a, the digit version management proxy module of client sends one version exchange request message carrying at least one original version object information and at least one target version object information to the version center; b, the version center, based on received version exchange request message, decides to exchange version objects and generates version exchange response message; c, the version center sends version exchange response message to the digit version management proxy module; d, the digit version management proxy module, based on received version exchange response message, replaces the original version object, or keeps the original version object.
Description
Technical field
The present invention relates to the digital network communications field, relate in particular to a kind of digital copyright management technology.
Background technology
DRM (Digital Rights Management digital copyright management) is the technology that occurs for the illegal use that prevents digital content in network service.Content supplier and operator can pass through the DRM technology, and leading subscriber uses downloaded contents, can prevent piracy effectively, protection content supplier/developer's rights and interests.At present, carried out number of research projects at DRM in the world.Wherein, the mobile DRM standard of OMA (Open MobileAlliance, Open Mobile Alliance) formulation has obtained supporting widely and admitting.
OMA DRM system comprise content center (Content Issuer, CI), the copyright center (Rights Issuer, RI) and DRM proxy module (DRM Agent).Wherein, CI is responsible for sending encrypted digital content product DCF (DRM Content Format) to the user, and the user downloads to this DCF among the DRMAgent on the terminal device.If the user wants to use the digital content of download, must to RI ask this DCF right objects (Rights Object, RO).Comprise the key of deciphering DCF among the RO, and the authorization administration information of numerical information, as the number of times that uses, the time limit of use etc.RO generally after finishing authentication and register flow path between terminal and the RI, sends terminal to by RI.
Simultaneously, user's demand of exchanging RO for also more and more becomes a general problem.The user exchanges that RO relates to an original RO or a plurality of original RO exchanges the change that a target RO or a plurality of target RO, an original RO or a plurality of original RO exchange the authority items among wherein one or more original RO for for for.
Be to be divided into two processes to the solution that exchanges RO in the present DRM technology, cancel original RO earlier, again the target RO that please look for novelty again.
The process of cancelling comprises: step 1, and client sends copyright to RI and cancels message; Step 2, RI receive described cancel message after, if agree to cancel then upgrade the record of cancelling of RO, send the RO cancellation letter to client; Step 3, client are deleted local original copyright after receiving cancellation letter.
Request process comprises: step 1, and client sends the RO request message to RI, the target copyright that request needs; Step 2 after the DRM Agent authentication of RI to client, postbacks response message; Step 3, client is according to receiving described response message installation targets RO.
The problem that existing DRM technology exists is: replacing copyright object needs reciprocal process at least twice, and can not finish replacing copyright object in reciprocal process.
Summary of the invention
Can not in a reciprocal process, finish the technical matters of replacing copyright object in order to solve existing DRM technology, the invention provides the method and system of replacing copyright object in a kind of system for numeral copyright management.
In order to solve the problems of the technologies described above, the method for replacing copyright object in a kind of system for numeral copyright management provided by the invention, the method comprising the steps of:
A. submit the copyright exchange request message that carries at least one original copyright object information and at least one target copyright object information to the copyright center; B. the copyright center judges whether to carry out the right objects exchange according to the described copyright exchange request message that receives, and produces copyright exchange response message; C. the digital copyright management proxy module of mind-set client sends described copyright exchange response message in the copyright; D. described digital copyright management proxy module is replaced original right objects according to the described copyright exchange response message that receives, and perhaps keeps original right objects.
Wherein, after step a and before the step b, comprise step:
A1. after the copyright center receives described copyright exchange request message, create an exchange indexing units that has this exchange identification;
Correspondingly, after step b and before the step c, comprise step:
C0. the copyright exchange response message that step b is produced is saved in the described exchange indexing units; C1. described digital copyright management proxy module sends the copyright that carries described exchange identification to the copyright center and obtains message; C2. corresponding copyright exchange response message is transferred according to described exchange identification in the copyright center from described exchange indexing units.
In one aspect of the invention, described exchange identification is produced by described digital copyright management proxy module, then described step a1 comprises: the uniqueness of the described exchange identification in the described copyright exchange request message is checked at the copyright center, and creates an exchange indexing units that has described exchange identification.
In another aspect of this invention, described exchange identification is produced by the copyright center, then described step a1 comprises: after the copyright center receives described copyright exchange request message, create an exchange indexing units that has this exchange identification, and send the triggering message that carries described exchange identification to described digital copyright management proxy module.
Wherein, in step a1, described exchange indexing units comprises: exchange identification, client identification and information are preserved item.
In the present invention, in step a, the parameter in described original copyright object information comprises: the original right objects of original copyright object identity or encryption, and this original right objects is used to exchange for the target right objects;
Parameter in described target copyright object information comprises: the target copyright object information of selection or target authority items, wherein, the target copyright object information of described selection is complete object right objects or the target copyright object identity that client is selected, described target authority items is at original right objects change authority information wherein, comprises the original copyright object identity that is modified.
Wherein, the parameter in described original copyright object information also comprises: residue copyright status information; The parameter of a described target copyright object information also comprises: at least one original copyright object identity, this original copyright object identity is used to identify the original right objects that exchanges the target right objects for.
In the present invention, judge whether among the described step b that the condition of carrying out the right objects exchange comprises:
B1. the legitimacy of the information of checking client identity and original right objects and correctness if be proved to be successful, are then accepted described copyright exchange request, otherwise the exchange of refusal copyright.
Wherein, judge whether among the described step b that the condition of carrying out the right objects exchange also comprises:
B2. preset an exchange threshold value at the copyright center, calculate the difference of target right objects and original right objects, if this difference is greater than exchanging threshold value, copyright exchange request is refused at the copyright center.
Wherein, judge whether among the described step b that the condition of carrying out the right objects exchange also comprises:
B3. the copyright center provides the target right objects according to target copyright object information, and upgrades local copyright object database, otherwise, the refusal copyright exchange request of copyright center.
In the present invention, in step c, described copyright exchange response message also comprises at least one exchange right objects information.Its parameter comprises: the replacing target authority items of the complete object right objects of encryption or encryption, described replacing target authority items is to generate according to the target authority items in the copyright exchange request message, comprises target copyright object identity and the original copyright object identity that is modified authority.
Wherein, the parameter of a described exchange right objects information also comprises: at least one original copyright object identity.Described original copyright object identity comprises the original copyright object identity in the target copyright object information, and perhaps described original copyright object identity is consistent with the original copyright object identity in the target copyright object information.
In the present invention, described steps d specifically comprises:
D1. described digital copyright management proxy module detects the status information in the described copyright exchange response message, if this status information is for to exchange successfully, and execution in step d2, otherwise, execution in step d3;
D2. described digital copyright management proxy module is replaced original right objects according to described copyright exchange response message with the target right objects;
D3. described digital copyright management proxy module keeps original right objects, process ends.
Wherein, described steps d 2 specifically comprises:
D21. described digital copyright management proxy module detects the exchange right objects information in the described copyright exchange response message, if this exchange right objects information is the complete object right objects of encrypting, execution in step d22 then, if described exchange right objects information is the replacing target authority items of encrypting, then execution in step d23;
D22. described digital copyright management proxy module is installed the complete object right objects of described encryption, and the corresponding all original right objects of deletion;
D23. described digital copyright management proxy module is replaced authority items in the corresponding original right objects automatically according to described replacing target authority items, and described original copyright object identity is replaced with new target copyright object identity, delete all original right objects that exchanged for simultaneously.
Correspondingly, the present invention also provides a kind of system for numeral copyright management, comprising: the digital copyright management proxy module of copyright center, content center and client.Wherein, described copyright center also comprises: first copyright receiving element, the first copyright switch processing unit, first copyright transmitting element that exchanges messages that exchanges messages;
Described digital copyright management proxy module also comprises: second copyright receiving element, the second copyright switch processing unit, second copyright transmitting element that exchanges messages that exchanges messages;
Wherein, second copyright transmitting element that exchanges messages is used for sending copyright exchange request message to first copyright receiving element that exchanges messages, the first copyright switch processing unit judges whether to carry out the copyright exchange according to the copyright exchange request message that this first copyright message sink unit receives, and result sent to second copyright receiving element that exchanges messages with the form of copyright exchange response message by first copyright transmitting element that exchanges messages, the second copyright switch processing unit is replaced original right objects or is kept original right objects with the target right objects according to second copyright copyright exchange response message that receiving element receives that exchanges messages.
In the present invention, described copyright center also comprises: the index creation unit is used to create the exchange concordance list with result and the exchange identification of storage after the first copyright switch processing unit is handled.
Wherein, in a kind of system for numeral copyright management provided by the invention, described first copyright transmitting element that exchanges messages also is used for sending the triggering message carry described exchange identification according to described exchange concordance list to second copyright receiving element that exchanges messages, and second copyright transmitting element that exchanges messages also is used for sending the copyright that carries described exchange identification and obtaining message to first copyright receiving element that exchanges messages.
Implement the present invention, have following beneficial effect:
In a kind of system for numeral copyright management provided by the invention in the method and system of replacing copyright object, the digital copyright management proxy module of client has comprised original copyright object information in the copyright exchange request message that the copyright center sends, the target copyright object information that exchanges for shows to exchange the target copyright for; The copyright center judges whether to meet the condition that exchanges for according to copyright exchange request message, if meet the target right objects that just provides new, and the renewal local data base, the target right objects is sent to the digital copyright management proxy module with the copyright exchange response message that carries the successful status information of exchange; The digital rights agent module of client is replaced local original right objects or is changed authority items in the original right objects with the target authority items of replacing with new target right objects according to the described response message of receiving.Exchanging in a reciprocal process of whole right objects finished, and do not need as prior art, to cancel earlier original right objects, go for the target right objects of looking for novelty again, through twice reciprocal process, can not in a reciprocal process, finish the technical matters that exchanges the target copyright for thereby overcome in the existing DRM technology.And technical scheme of the present invention only needs reciprocal process one time, has simplified flow process, reduced network burden, and increased the degree of freedom that the user selects, the user is replacing copyright object neatly, and the phenomenon of request no longer again can not occur only moving back, overcome the problem of the wasting of resources.
Description of drawings
Fig. 1 is a kind of system for numeral copyright management structure diagram of the present invention;
Fig. 2 is the structure diagram at copyright center in the system for numeral copyright management shown in Figure 1;
Fig. 3 is the structure diagram of digital copyright management proxy module in the system for numeral copyright management shown in Figure 1;
Fig. 4 is the process flow diagram of first specific embodiment of the method for replacing copyright object in a kind of system for numeral copyright management of the present invention;
Fig. 5 is the process flow diagram of second specific embodiment of the method for replacing copyright object in a kind of system for numeral copyright management of the present invention;
Fig. 6 is the process flow diagram of the original right objects of digital copyright management proxy resume module in the method for replacing copyright object in Fig. 4 or a kind of system for numeral copyright management shown in Figure 5;
Fig. 7 is user and Portal interactive interface synoptic diagram;
Fig. 8 is the synoptic diagram of Aimed RO Info List parameter value;
Fig. 9 is the synoptic diagram of the Trade RO Info List parameter value that goes out of DRM proxy resolution.
Embodiment
Further set forth technical scheme of the present invention below in conjunction with accompanying drawing.
With reference to figure 1, illustrate a kind of system for numeral copyright management of the present invention.This DRM system comprises the DRM proxy module 104 in content center 101, copyright center 102 and the client 103.
With reference to figure 2, copyright center 102 also comprises: first copyright exchange messages receiving element 201, first copyright exchange messages transmitting element 202, the first copyright switch processing unit 203 and index creation unit 204.
With reference to figure 3, DRM proxy module 104 also comprises: second copyright exchange messages receiving element 301, second copyright exchange messages transmitting element 302 and the second copyright switch processing unit 303.
Wherein, second copyright transmitting element 302 that exchanges messages sends copyrights exchange request messages to exchange messages receiving element 201 of first copyright, the first copyright switch processing unit 203 judges whether to carry out the copyright exchange according to the copyright exchange request message that the first copyright message sink unit 201 receives, and result sent to second copyright receiving element 301, the second copyright switch processing units 303 that exchange messages and replace original right objects or keep original right objects with the target right objects according to second copyright copyright exchange response message that receiving element 301 receives that exchanges messages by first copyright transmitting element 202 that exchanges messages with the form of copyright exchange response message.
With reference to figure 4, illustrate the process flow diagram of first specific embodiment of the method for replacing copyright object in a kind of system for numeral copyright management of the present invention.
Step S401, the DRM proxy module of client sends RO Trade Request (copyright exchange request) message to RI, and request exchanges the RO of another media content for or changes the authority of the RO of existing media content.Reference table 1, the parameter that comprises in this message: Device ID (client device label), the RI ID (copyright center sign) that issues original copyright, Device nonce (client device is interim), Request Time (the DRM current time of client), Original RO Info List (original copyright object information tabulation), Aimed ROInfo List (tabulation of target copyright object information), Certificate chain (certificate chain), Extensions (extension of message item) and Signature (drm agent is to the signature of local message).
Table 1 RO Trade Request message parameter
| Parameter | Essential (M)/optional (O) | Describe |
| Device ID | M | The client device of identification request |
| RI ID | M | Sign is issued the RI of original copyright |
| Device nonce | M | The nonce of choice of equipment prevents Replay Attack |
| Request Time | M | The DRM current time of device measuring |
| Original RO Info List | M | Identify the tabulation of original copyright object information, comprise one or more Original RO Info |
| Aimed RO Info List | M | The tabulation of sign target copyright object information comprises one or more Aimed RO Info |
| Certificate chain | O | The Authentication devices needed certificate chain of signing |
| Extensions | O | Extension of message is seen the OMADRM2.0TS standard |
| Signature | M | Equipment is to the signature of RO Trade Request message |
The parameter of table 2 Original RO Info
| Parameter | Essential (M)/optional (O) | Describe |
| RO ID | O | The ID of original RO among the Original RO Info, comprises RO ID, does not then comprise Protected Original RO |
| Protected Original RO | O | The complete original RO that encrypts, among the Original RO Info, comprise Protected Original RO, then do not comprise RO ID |
| Rights State | O | The residue copyright status information of original copyright, i.e. the current state of the original RO permission of DRM Agent preservation.When original RO is when state is arranged, Original RO Info must comprise this parameter, and this parameter and RO ID or Protected Original RO share |
Wherein, among the Original RO Info List, comprise at least one Original RO Info (original copyright object information), satisfy the user exchanges a target RO for at least one original RO demand.Reference table 2, Original RO Info comprises original RO ID (original copyright object identity) or Protected Original RO (the original RO of encryption), when if this RO has state, also need the DRM proxy module to submit the residue copyright status information (Rights State) of original RO to, such as: allow to use 5 times RO also surplus 2 rights to use when the user changes.
Among the Aimed RO Info List, comprise at least one Aimed RO Info, satisfy the user and exchange more than one target RO simultaneously for.Reference table 3, Aimed RO Info comprise Selected RO (the target RO information that the user has selected) or Aimed Rights (at same media content, change the target authority items among the original RO, as: change a time period etc.).If exchange a target RO for, then also comprise Original RO ID (supporting all original RO signs of handing over) among the Aimed RO Info for exchanging this target RO for a plurality of original RO.
The parameter of table 3 Aimed RO Info
| Parameter | Essential (M)/optional (O) | Describe |
| Selected RO | O | The target RO information of having selected comprises target RO ID.Among the Aimed RO Info, comprise Selected RO, then do not comprise Aimed Rights |
| Aimed Rights | O | At same media content, change the target authority items information among the original RO, comprise the original RO ID that is modified, among the Aimed RO Info, comprise Aimed Rights, then do not comprise Selected RO |
| Original RO ID | O | For exchanging the ID that target RO supports the original RO that hands over for, in an Aimed RO Info, this parameter can be a plurality of, satisfy the demand that a plurality of original RO exchange a target RO for, this parameter must be share with Selected RO or Aimed Rights |
Step S402, the copyright center judges whether to carry out the right objects exchange according to the RO Trade Request message that receives, and wherein, Rule of judgment comprises:
The legitimacy of the identity of a, RI checking client and original RO relevant information and correctness, original RO relevant information comprise whether the owner of original RO is the client of submitting the exchange request to, or the holder of client; Whether the residue copyright of original RO is consistent with the Rights State parameter (this parameter is included among the Original RO Info) that exchanges in asking.
B, judge whether to agree that copyright exchanges transaction for, and calculate the price difference that exchanges RO for.Wherein, a configuration file can be set, preserve following parameter:, not allow to change RO when price difference during greater than Max_Dfr at the RI server side.Whether RI agrees that according to this rule judgment copyright exchanges transaction for.In addition, the calculating of RO price difference can be with reference to the relative commercial strategy and the regulation of operator/content supplier.
C, RI provide the target right objects, and upgrade local RO database.If Aimed RO Info submits the Selected RO that the user has selected in advance in the RO Trade Request message, then RI extracts this RO and gets final product from database.If what Aimed RO Info submitted to is the copyright change claim of user to original RO, i.e. Aimed Rights, then RI generates target RO or target authority items according to this Aimed Rights, and upgrades local data base.
If satisfy above-mentioned condition, RI then creates a status information and is the successful copyright exchange response message of exchange.Otherwise the copyright exchange response message that to create a status information be swap fault may further include the reason of RO swap fault in this message.
Step S403, RI send RO TradeResponse (the copyright exchange response) message that carries described status information to the DRM proxy module.Reference table 4, the parameter that comprises in this message: Status (status information), Device ID, the RI ID that issues the target copyright, Device nonce, Trade RO Info List (exchange right objects information list), Certificate chain, OCSP Response (OCSP response), Extensions and Signature.
Table 4 RO RO Trade Response message parameter
| Parameter | Essential (M)/optional (O) | Describe | |
| Status＝Success | Status≠Success | ||
| Status | M | M | Handle the report of RO Request condition of information |
| Device ID | M | - | Client device identification is identical with Device ID in the RO Trade Request message |
| RI ID | M | - | Sign is issued the RI of target RO |
| Device nonce | M | - | The nonce of choice of equipment, prevent Replay Attack, this value must be identical with the Device nonce in the RO Trade Request message |
| Trade RO Info List | M | - | Exchange the target copyright list of exchange for, comprise one to a plurality of Trade RO Info |
| Certificate chain | O | - | The certificate chain that the Authentication devices signature is required |
| OCSP Response | O | - | Whether the indication certificate chain is effective |
| Extensions | O | - | Extension of message is seen OMA DRM2.0TS standard |
| Signature | M | - | RI is to RO Trade Response |
| The signature of message |
Wherein, among the Trade RO Info List, comprise at least one Trade RO Info (exchange right objects information), to satisfy the requirement that the user exchanges an above target RO simultaneously for.Reference table 5, this Trade RO Info comprise the complete object RO (Protected Aimed RO) of the encryption that the user wishes or the replacing target authority items (Replace Item) of the encryption that generates according to AimedRights.If comprise in the Aimed RO Info parameter in the RO Trade Request message " Original RO ID ", then also must comprise " Original RO ID " among the Trade RO Info, and both unanimities, perhaps the latter comprises all ID among the former.
The parameter of table 5 Trade RO Info
| Parameter | Essential (M)/optional (O) | Describe |
| Protected Aimed RO | O | The complete object RO that encrypts, comprise Protected Aimed RO among the Trade RO In fo, then do not comprise Replace Item |
| Replace Item | O | The target authority items of the replacing of encrypting, comprise new RO ID, and the original RO ID that replaces, comprise Replace Item among the Trade RO Info, then do not comprise Protected Aimed RO |
| Original RO ID | O | For exchanging the ID that target RO supports the original RO that hands over for, if contain Original RO ID among the Aimed RO Info in the RO Trade Request message, then also this parameter must be arranged among the Trade RO Info, and comprise the Original RO ID among the Aimed RO Info among this Original RO ID, perhaps this Original RO ID is consistent with the Original RO ID among the Aimed RO Info. |
Step S404, the DRM proxy module is handled original right objects according to the described RO Trade Response message that receives, and its processing procedure comprises with reference to figure 6:
In step S601, the DRM proxy module detects described status information Status, if Status for to exchange successfully, then carries out S602, otherwise, carry out S605.
In step S602, the DRM proxy module detects the Trade RO Info among the RO Trade Response, if the parameter that comprises among this Trade RO Info is Protected Aimed RO, then execution in step S603; If the parameter that comprises among the described Trade RO Info is Replace Item, then execution in step S604.
In step S603, the DRM proxy module is installed Protected Aimed RO, and according to Original ROID, all original right objects that deletion is corresponding finish.
In step S604, the DRM proxy module is according to the original RO ID among the Replace Item, with the authority items in the corresponding original right objects of the replacement of the authority information among the Replace Item.And will this original RO ID replace with the new target RO ID among the Replace Item.If also comprise parameter Original RO ID among the Trade RO Info, the DRM proxy module also will be deleted the every other original right objects of these ID correspondences, finishes.
In step S605, the DRM proxy module keeps original right objects, finishes.
With reference to figure 5, illustrate the process flow diagram of a kind of second specific embodiment of the present invention.
In step S501, the DRM proxy module of client sends RO Trade Request message to RI, and request exchanges the RO of another media content or the authority that change has the RO of media content now for.
Step S502, after RI receives above-mentioned RO Trade Request message, distribute a Trade ID (exchange identification) to this exchange, create an exchange concordance list that has this Trade ID as shown in table 6, and send Trigger (triggering) message that carries described Trade ID to the DRM proxy module.
In Trigger message, can also carry the parameter of an express time, be used to refer to client and go for again in some moment subsequently and ask right objects.
Table is drawn in the clearing house that table 6 RI safeguards
| Exchange identification | Device identification | Information is preserved item | |
| Trade ID | Device ID | RO Trade Request (optional) | RO Trade Response |
Step S503, the copyright center judges whether to carry out the right objects exchange according to the RO Trade Request message that receives, Rule of judgment among the step S402 of its Rule of judgment and first specific embodiment is identical, and will handle the RO Trade Response message that produces and be saved in the exchange concordance list.
Step S504, DRM proxy module send RO Obtain (copyright is obtained) message that carries described Trade ID to RI.
The DRM proxy module can be to send this RO Obtain message the moment of appointment in Trigger message.
Step S505, the RI checking client extracts corresponding RO Trade Response message according to described Trade ID from the exchange concordance list, then this RO Trade Response message is postbacked the proxy module to client DRM.
Step S507, the DRM proxy module is handled original right objects according to the described RO Trade Response message that receives, and its processing procedure is identical with the processing procedure of first embodiment step S404.
In this specific embodiment, Trade ID among the step S502 is produced by described digital copyright management proxy module, then step S502 comprises: the uniqueness of the described exchange identification in the described copyright exchange request message is checked at the copyright center, and create an exchange indexing units that has described exchange identification, no longer send and trigger message to the DRM proxy module.
In order further to understand the present invention,, the 3rd specific embodiment proposed at the method for replacing copyright object in a kind of system for numeral copyright management provided by the invention.
Mobile subscriber is current 10 original RO, is designated as RO respectively
1, RO
2, RO
3, RO
4, RO
5, RO
6, RO
7, RO
8, RO
9, RO
10, it is designated 1,2,3,4,5,6,7,8,9,10.The user wishes to use RO
1, RO
2, RO
3, RO
4, RO
5, RO
6, RO
7, RO
8Exchange the target right objects RO that is designated a for
a, and use RO
9And RO
10Exchange the target right objects RO that is designated b for
b, RO wherein
bBe to RO
9The authority items of copyright done a change, prolonged service time.
User's initial landing is filled in the relevant information that exchanges RO for to Portal (door) interface of RI, and submits described relevant information to RI.With reference to figure 7, it is the synoptic diagram of user and Portal interactive interface, wherein, in raw information, comprise original copyright object identity (Original RO ID), original copyright center sign (Original RI ID), residue copyright status description (Original Rights State), and other information; In target information, comprise the target copyright object information (Selected Aimed RO) of selection and wait other option, the definition of permit operation and operational constraints to see in the OMA DRM2.0TS standard definition is arranged for the target copyright object factory (Aimed Rights Description) that the user edits.The user can be in advance on the webpage of content center, on the Portal of RI or approach such as super distribution, choose the RO that needs, can be the RO of different media contents or same media content, and the ID of this RO and the RI ID that issues this target RO be filled up on the described interface, if the user only wants original RO is carried out little change, can choose target copyright object factory item, editor needs the authority information of change.
In the present embodiment, the user is earlier on interface shown in Figure 7, in " raw information " hurdle, successively fill in original copyright object identity 1,2,3,4,5,6,7,8, in " target information " hurdle, choose uniterming " the target copyright object information of selection ", and fill in " target copyright object identity " for a, finish filling in of a target copyright information.
On the User Interface of next target copyright information (as shown in Figure 7), in " raw information " hurdle, successively fill in original copyright object identity 9,10.Choose uniterming " target copyright object factory " in " target information " hurdle, " the original copyright object identity " filled in wherein is 9, and fills in the user and want the claim description changed in " operation permission " and " operational constraints " hurdle." term of life " as " broadcast " changes " September 1 was to September 10 " into.
Portal changes into the content at above-mentioned interface RO Trade Request message and submits to the RI processing, with reference to figure 8, be the synoptic diagram of Aimed RO Info List, comprise two Aimed RO Info, an AimedRO Info comprises Selected RO, promptly is designated the RO of a
a, and the original right objects RO that exchanges this target RO for
1, RO
2, RO
3, RO
4, RO
5, RO
6, RO
7, RO
8Sign 1,2,3,4,5,6,7,8, another Aimed RO Info comprises that (at same media content, change being designated 9 RO to Aimed Rights
9In the target authority items in permit operation, form the new target right objects RO that is designated b
b, sign b can be distributed by RI subsequently), wherein, Aimed Rights comprises right objects sign 9 and the operation licensed option that is modified.Also be included as among the Aimed RO Info and exchange RO for
bAnd to the original right objects RO that hands over
9, RO
10Sign 9,10.
After RI handles RO Trade Request message, if agree the copyright exchange, then send ROTrade Response message, the parameter that comprises in this message: Status, Device ID, the RI ID that issues the target copyright, Device nonce, Trade RO Info List, Certificate chain, OCSP Response, Extensions and Signature to client.
Wherein, Trade RO Info List is with reference to figure 9, it is the synoptic diagram of Trade RO Info List, comprise two Trade RO Info, one of them Trade RO Info comprises Protected Aimed RO, promptly is designated the complete target right objects RO of the encryption of a
aAnother Trade RO Info comprises Replace Item, the i.e. encryption that generates according to Aimed Rights the target authority items, comprise: new copyright object identity b, the right objects sign 9 and the authority (term of life 10 days from September 1 to September) that are modified exchange this target right objects RO in addition for
bOriginal right objects RO
9, RO
10Sign 9,10.
The DRM proxy module is resolved Trade RO Info wherein according to the described RO Trade Response message that receives, and wherein, first Trade RO Info comprises Protected Aimed RO, is the RO that encrypts
a, the DRM proxy module is installed the target right objects RO that is designated a
a, and deletion is designated the original right objects RO of 1,2,3,4,5,6,7,8 correspondences
1, RO
2, RO
3, RO
4, RO
5, RO
6, RO
7, RO
8
Second Trade RO Info comprises Replace Item, and the right objects of DRM proxy module basis Replaced RO ID (the right objects sign that is modified) sign is wherein replaced RO with the authority information among the Replace Item
9In authority items.And this primary object sign 9 is replaced with new target copyright object identity b, and deletion simultaneously is used for exchanging for RO
bBe designated 10 original right objects RO
10, and there has not been RO in definite this locality
9, otherwise deletion RO
9, finish.
In all above-mentioned embodiment, the interacting message of replacing copyright object can pass through HTTP (HyperText Transfer Protocol, hypertext link) agreement or ROAP (Rights Object AcquistionProtocol, copyright is obtained) agreement realizes.
From the above, in a kind of system for numeral copyright management provided by the invention in the method and system of replacing copyright object, the digital copyright management proxy module of client has comprised original copyright object information in the copyright exchange request message that the copyright center sends, the target copyright object information that exchanges for shows that needs will exchange the target copyright for; The copyright center judges whether to meet the condition that exchanges for according to copyright exchange request message, if meet the target right objects that just provides new, and new database more, the target right objects is exchanged response message with the copyright that carries the successful status information of exchange send to the digital copyright management proxy module; The digital rights agent module of client is replaced local original right objects or is changed authority items in the original right objects with the target authority items that will change with new target right objects according to the described response message of receiving.Exchanging in a reciprocal process of whole right objects finished, and do not need as prior art, to cancel earlier original right objects, go for the target right objects of looking for novelty again, through twice reciprocal process, can not in a reciprocal process, finish the technical matters that exchanges the target copyright for thereby overcome in the existing DRM technology.And technical scheme of the present invention only needs reciprocal process one time, has simplified flow process, reduced network burden, and increased the degree of freedom that the user selects copyright, the user can exchange the right objects that needs neatly for, and the phenomenon of request no longer again can not occur only moving back, resource is no longer wasted.
In second specific embodiment of the present invention, technical solution of the present invention identifies this exchange with Trade ID earlier, RI handles RO Trade Request message more then, the RO Trade Response message that generates is preserved in the exchange concordance list, when user's needs or RI have disposed by the time, client sends the mode replacing copyright object of RO Obtain message extraction RO Trade Response message again, this has not only solved prior art can not finish the technical matters that exchanges the target copyright in a reciprocal process, and RI and client handled the copyright exchange more neatly, the system that makes optimizes more.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (21)
1, the method for replacing copyright object in a kind of system for numeral copyright management is characterized in that the method comprising the steps of:
A. submit the copyright exchange request message that carries at least one original copyright object information and at least one target copyright object information to the copyright center;
B. the copyright center judges whether to carry out the right objects exchange according to the described copyright exchange request message that receives, and produces copyright exchange response message;
C. the digital copyright management proxy module of mind-set client sends described copyright exchange response message in the copyright;
D. described digital copyright management proxy module is replaced original right objects according to the described copyright exchange response message that receives, and perhaps keeps original right objects.
2, the method for claim 1 is characterized in that, comprises step after step a and before the step b:
A1. after the copyright center receives described copyright exchange request message, create an exchange indexing units that has this exchange identification;
After step b and before the step c, comprise step:
C0. the copyright exchange response message that step b is produced is saved in the described exchange indexing units;
C1. described digital copyright management proxy module sends the copyright that carries described exchange identification to the copyright center and obtains message;
C2. corresponding copyright exchange response message is transferred according to described exchange identification in the copyright center from described exchange indexing units.
3, method as claimed in claim 2, it is characterized in that, described exchange identification is produced by described digital copyright management proxy module, then described step a1 comprises: the uniqueness of the described exchange identification in the described copyright exchange request message is checked at the copyright center, and creates an exchange indexing units that has described exchange identification.
4, method as claimed in claim 2, it is characterized in that, described exchange identification is produced by the copyright center, then described step a1 comprises: after the copyright center receives described copyright exchange request message, create an exchange indexing units that has this exchange identification, and send the triggering message that carries described exchange identification to described digital copyright management proxy module.
As claim 3 or 4 described methods, it is characterized in that 5, in step a1, described exchange indexing units comprises: exchange identification, client identification and information are preserved item.
6, method as claimed in claim 1 or 2, it is characterized in that, in step a, the parameter in described original copyright object information comprises: the original right objects of original copyright object identity or encryption, and this original right objects is used to exchange for the target right objects;
Parameter in described target copyright object information comprises: the target copyright object information of selection or target authority items, wherein, the target copyright object information of described selection is complete object right objects or the target copyright object identity that client is selected, and described target authority items is at original right objects change authority information wherein.
7, method as claimed in claim 6 is characterized in that, the parameter in described original copyright object information also comprises: residue copyright status information;
The parameter of a described target copyright object information also comprises: at least one original copyright object identity, this original copyright object identity is used to identify the original right objects that exchanges the target right objects for.
8, method as claimed in claim 6 is characterized in that, described target authority items comprises the original copyright object identity that is modified.
9, method as claimed in claim 1 or 2 is characterized in that, judges whether among the described step b that the condition of carrying out the right objects exchange comprises:
B1. the legitimacy of the information of checking client identity and original right objects and correctness if be proved to be successful, are then accepted described copyright exchange request, otherwise the exchange of refusal copyright.
10, method as claimed in claim 9 is characterized in that, described condition also comprises:
B2. preset an exchange threshold value at the copyright center, calculate the difference of target right objects and original right objects, if this difference is greater than exchanging threshold value, copyright exchange request is refused at the copyright center.
11, method as claimed in claim 9 is characterized in that, described condition also comprises:
B3. the copyright center provides the target right objects according to target copyright object information, and upgrades local copyright object database, otherwise, the refusal copyright exchange request of copyright center.
12, method as claimed in claim 1 or 2 is characterized in that, in step c, described copyright exchange response message comprises at least one exchange right objects information.
13, method as claimed in claim 12 is characterized in that, the parameter of a described exchange right objects information comprises: the replacing target authority items of the complete object right objects of encryption or encryption.
14, method as claimed in claim 13 is characterized in that, described replacing target authority items is to generate according to the target authority items in the copyright exchange request message, comprises target copyright object identity and the original copyright object identity that is modified authority.
15, method as claimed in claim 13 is characterized in that, the parameter of a described exchange right objects information also comprises: at least one original copyright object identity.
16, method as claimed in claim 15, it is characterized in that, described original copyright object identity comprises the original copyright object identity in the target copyright object information, and perhaps described original copyright object identity is consistent with the original copyright object identity in the target copyright object information.
17, method as claimed in claim 1 or 2 is characterized in that, described steps d comprises:
D1. described digital copyright management proxy module detects the status information in the described copyright exchange response message, if this status information is for to exchange successfully, and execution in step d2, otherwise, execution in step d3;
D2. described digital copyright management proxy module is replaced original right objects according to described copyright exchange response message with the target right objects;
D3. described digital copyright management proxy module keeps original right objects, process ends.
18, the method for stating as claim 17 is characterized in that, described steps d 2 comprises:
D21. described digital copyright management proxy module detects the exchange right objects information in the described copyright exchange response message, if this exchange right objects information is the complete object right objects of encrypting, execution in step d22 then, if described exchange right objects information is the replacing target authority items of encrypting, then execution in step d23;
D22. described digital copyright management proxy module is installed the complete object right objects of described encryption, and the corresponding all original right objects of deletion;
D23. described digital copyright management proxy module is replaced authority items in the corresponding original right objects automatically according to described replacing target authority items, and described original copyright object identity is replaced with new target copyright object identity, delete all original right objects that exchanged for simultaneously.
19, a kind of system for numeral copyright management, comprise: the digital copyright management proxy module of copyright center, content center and client, it is characterized in that described copyright center also comprises: first copyright receiving element, the first copyright switch processing unit, first copyright transmitting element that exchanges messages that exchanges messages;
Described digital copyright management proxy module also comprises: second copyright receiving element, the second copyright switch processing unit, second copyright transmitting element that exchanges messages that exchanges messages;
Wherein, second copyright transmitting element that exchanges messages is used for sending copyright exchange request message to first copyright receiving element that exchanges messages, the first copyright switch processing unit judges whether to carry out the copyright exchange according to the copyright exchange request message that this first copyright message sink unit receives, and result sent to second copyright receiving element that exchanges messages with the form of copyright exchange response message by first copyright transmitting element that exchanges messages, the second copyright switch processing unit is replaced original right objects or is kept original right objects with the target right objects according to second copyright copyright exchange response message that receiving element receives that exchanges messages.
20, system as claimed in claim 19 is characterized in that, described copyright center also comprises:
The index creation unit is used to create the exchange indexing units with result and the exchange identification of storage after the first copyright switch processing unit is handled.
21, system as claimed in claim 20, it is characterized in that, described first copyright transmitting element that exchanges messages also is used for sending the triggering message carry described exchange identification according to described exchange indexing units to second copyright receiving element that exchanges messages, and second copyright transmitting element that exchanges messages also is used for sending the copyright that carries described exchange identification and obtaining message to first copyright receiving element that exchanges messages.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610122188.2A CN100483435C (en) | 2006-09-15 | 2006-09-15 | Method and system for replacing copyright object in digital copyright management system |
| PCT/CN2007/070581 WO2008034379A1 (en) | 2006-09-15 | 2007-08-29 | Method, system and device for replacing copyright object in digital copyright management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610122188.2A CN100483435C (en) | 2006-09-15 | 2006-09-15 | Method and system for replacing copyright object in digital copyright management system |
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| CN1920842A true CN1920842A (en) | 2007-02-28 |
| CN100483435C CN100483435C (en) | 2009-04-29 |
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| CN200610122188.2A Active CN100483435C (en) | 2006-09-15 | 2006-09-15 | Method and system for replacing copyright object in digital copyright management system |
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| CN (1) | CN100483435C (en) |
| WO (1) | WO2008034379A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236753A (en) * | 2010-05-07 | 2011-11-09 | 中兴通讯股份有限公司 | Rights management method and system |
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| US10133875B2 (en) | 2016-01-29 | 2018-11-20 | Konica Minolta Laboratory U.S.A., Inc. | Digital rights management system implementing version control |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100337221C (en) * | 2003-07-18 | 2007-09-12 | 华为技术有限公司 | Digital content copyright protection and management method and system |
| TWI234979B (en) * | 2003-12-19 | 2005-06-21 | Inst Information Industry | Digital content protection method |
| CN100337175C (en) * | 2005-08-12 | 2007-09-12 | 华为技术有限公司 | Method and system of adding region and obtaining authority object of mobile terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236753A (en) * | 2010-05-07 | 2011-11-09 | 中兴通讯股份有限公司 | Rights management method and system |
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| Publication number | Publication date |
|---|---|
| WO2008034379A1 (en) | 2008-03-27 |
| CN100483435C (en) | 2009-04-29 |
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